//类型定义typedef
#include<stdio.h>
#include<string.h>
typedef struct node{
    int data;
    double num;
}aNode;//aNode可代替struct node

 typedef char* string;//Strings是字符串的数组

int main(int argc,char const* argv[]){
    aNode g ={5,7.0};
    typedef int Length;//Length等价于int类型
    string f="hell";
    char *s1="hello";
    printf("%d",strcmp(s1,f));
   return 0;

}